Method for installing small-curve-radius fan-shaped unequal-span cloth span bridge beam plate

The invention relates to a small-curve-radius fan-shaped unequal-span cloth span bridge beam plate installation method, and belongs to the technical field of bridge construction, and the method comprises the following steps: enabling the central axis in the length direction of a main beam of a bridge girder erection machine to be parallel to the longitudinal axis of an N-1 #-N # span beam; the front track is mounted on the N-1 # cover beam, so that the length direction of the front track is parallel to the width direction of the N-1 # cover beam; the middle track is parallel to the front track; the two ends of the beam plate are hoisted to the installation positions of the N-1 # cover beam and the N # cover beam through the 1 # movable winch and the 2 # movable winch correspondingly, and then beam falling is conducted; the embedded steel bars of the end cross beams, the top plates and the middle partition plates of the adjacent beam plates are mutually lapped and firmly welded; the installation method has the